Moss Giant Island is a small island just off the north-west corner of Karamja. Level 10 Agility is required to swing on the tree-hung rope to access this island. There are 5 moss giants on the island. There are a few safespots as well, allowing for ranged and magic combat. Unlike other moss giant spawns, this place is relatively vacant.

Two slices of cake respawn on the island. It respawns approximately every 54 seconds and may prove to be a decent source of food for low levelled players.

A player using the rope swing to access Moss Giant Island.

Many players like to use a dwarf multicannon on Slayer tasks. A good place to place the cannon is in the clearing on the south of the island. If the player then stands to the west of it, the cannon will rotate and shoot two of the moss giants, while another will spawn on top of the cannon for the player to attack themself.